X0306 4 2018-05-29 1 0001727196 Scholar Rock Holding Corp SRRK 0001218180 Artal International S.C.A. VALLEY PARK 44, RUE DE LA VALLEE LUXEMBOURG N4 L-2661 LUXEMBOURG 0 0 1 0 0001340097 Invus Public Equities, L.P. C/O THE INVUS GROUP, LLC 750 LEXINGTON AVENUE, 30TH FLOOR NEW YORK NY 10022 0 0 1 0 0001340096 Invus Public Equities Advisors, LLC C/O THE INVUS GROUP, LLC 750 LEXINGTON AVENUE, 30TH FLOOR NEW YORK NY 10022 0 0 1 0 0001522131 Artal International Management S.A. VALLEY PARK 44, RUE DE LA VALLEE LUXEMBOURG N4 L-2661 LUXEMBOURG 0 0 1 0 0001053906 Artal Group S.A. VALLEY PARK 44, RUE DE LA VALLEE LUXEMBOURG N4 L-2661 LUXEMBOURG 0 0 1 0 0001283968 Westend S.A. VALLEY PARK 44, RUE DE LA VALLEE LUXEMBOURG N4 L-2661 LUXEMBOURG 0 0 1 0 0001460840 Stichting Administratiekantoor Westend IJSSELBURCHT 3 ARNHEM P7 NL-6825 BS NETHERLANDS 0 0 1 0 0001460839 Minne Pascal PLACE STE. GUDULE, 19 BRUXELLES C9 B-1000 BELGIUM 0 0 1 0 Common Stock 2018-05-29 4 C 0 1946040 A 1946040 D Common Stock 2018-05-29 4 P 0 450000 14 A 450000 I See Footnote Series C Preferred Stock 2018-05-29 4 C 0 5555556 D Common Stock 1946040 0 D Each share of Preferred Stock automatically converted into Common Stock, for no additional payment or consideration, on a 2.8548-for-1 basis at the closing of the Issuer's initial public offering on May 29, 2018. The shares reported as purchased on May 29, 2018 were purchased in the Issuer's initial public offering. These securities are directly held by Artal International S.C.A. These securities are directly held by Invus Public Equities, L.P. Mr. Pascal Minne is the sole member of the Board of Stichting Administratiekantoor Westend. Stichting Administratiekantoor Westend is the parent company of Westend S.A. Westend S.A. is the parent company of Artal Group S.A. Artal Group S.A. is the parent company of Artal International Management S.A., which is the managing partner of Artal International S.C.A. Artal International S.C.A. is the managing member of Invus Public Equities Advisors, LLC. Invus Public Equities Advisors, LLC is the general partner of Invus Public Equities, L.P. Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose. ARTAL INTERNATIONAL S.C.A. By: ARTAL INTERNATIONAL MANAGEMENT S.A., its managing partner By: /s/ Anne Goffard Name: Anne Goffard Title: Managing Director 2018-05-31 INVUS PUBLIC EQUITIES, L.P. By: Invus Public Equities Advisors, L.L.C., its general partner By: /s/Raymond Debbane Name: Raymond Debbane Title: President 2018-05-31 INVUS PUBLIC EQUITIES ADVISORS, L.L.C. By: /s/Raymond Debbane Name: Raymond Debbane Title: President 2018-05-31 ARTAL INTERNATIONAL MANAGEMENT S.A. By: /s/ Anne Goffard Name: Anne Goffard Title: Managing Director 2018-05-31 ARTAL GROUP S.A. By: /s/ Anne Goffard Name: Anne Goffard Title: Authorized Person 2018-05-31 WESTEND S.A. By: /s/ Pascal Minne Name: Pascal Minne Title: Director 2018-05-31 STICHTING ADMINISTRATIEKANTOOR WESTEND By: /s/ Pascal Minne Name: Pascal Minne Title: Sole Member of the Board 2018-05-31 /s/ Pascal Minne Name: Pascal Minne 2018-05-31